A car travels due east at while

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

1.5\times10^{3}\,\text{kg}

car travels due east at

20\,\text{m/s}

while, on the same straight road, a

2.5\times10^{3}\,\text{kg}

truck travels due east at

10\,\text{m/s}

. A

1.0\times10^{3}\,\text{kg}

motorcycle next to them is momentarily at rest. What is the magnitude of the total linear momentum of this three-vehicle system at that instant? (a)

4.0\times10^{4}\,\text{kg}\cdot\text{m/s}

(b)

5.5\times10^{4}\,\text{kg}\cdot\text{m/s}

(c)

2.5\times10^{4}\,\text{kg}\cdot\text{m/s}

(d)

5.0\times10^{4}\,\text{kg}\cdot\text{m/s}